Cell Phone Jammers

Whether you need a cell phone jammer to block a signal in a small indoor space or a medium sized outdoor radius, our variety of devices offer a solution for any application. Each of these fixed location signal blockers describes what the best uses are, as well as the amount of coverage area you can expect. Need mobility? See our portable mobile blocker section. As always, if you have any questions we are happy to assist you.

A very solid performer which is popular with customers, this fixed location unit includes a remote control for on / off, as well as 5 bands of coverage. This heavy duty model is the best value in this price range...

5 Band Super Heavy Duty Adjustable
This is one of our most popular and dependable cellphone jammers. Adjustment knobs directly on the unit allow for signal strength adjustment, and a remote is included for...

Jammer 4G & 4G LTE Fixed Model
Do you need a full coverage solution that includes 4G? Want to prevent the showrooming trend in your retail store or exam cheating in your classroom? Are employees spending more time...

The set it and forget it durability of the 4 band workhorse makes it perfect for small prisons or detention facilities, but it works well for any application where non stop jamming is required for security.
It can provide...

This very versatile model is perfect for setting up in meeting rooms or classrooms, taking with you when you go into client meetings, or when you travel.
It has 5 band coverage, and a range of up to 20 meters...

The All in One can block up to 5 bands, with an option for blocking GPS, WiFi, and Bluetooth.
This is a powerful, worry free model that can operate full time and does not require a cool down period.
Our latest design and...

This 45W indoor will restrict all CDMA, GSM, DCS and 3G communications signals up to 10,000 square meters in area.If your application requires a large area of coverage, this is the ideal model for you. Organizations...

All in One 4G
Our newest product is the All in One 4G. Just like the original and very popular All in One, it can block up to 5 bands. However the new 4G model also blocks 4G.
This is a powerful, dependable blocker...

GSM Jammer Workhorse II
An updated version of our popular 4 Band Workhorse, this model has adjustable signal strength, as well as optional GPS/WiFi Jamming, making it perfect for small prisons or detention centers, or...

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What You Should Know Cell Phone Jammer Usage

Cell phones have truly been increasing in popularity year after year for decades now1. One study even shows that well over 200 million people within the US alone had cellular service in October of 2005 but that number has exponentially increased in the eight years that have passed since that time. They are even more ubiquitous throughout Europe.

Being able to contact anyone whenever the need to do so arises is a convenience that many people can easily take for granted. However, there is a dark side to mobile phones that many business owners have had to experience firsthand the hard way.

The Dark Side of Cell Phones

Mobiles are great communication tools that are effective and efficient in many ways, but there are still people that use these devices at the most inconvenient times. Within a wide range of different public places (theaters, restaurants, concerts, funeral parlors, churches), people simply do not know when to put their mobile phones away. It can be socially unacceptable for others, who are frustrated by these individuals that decide to do whatever they want, even in situations with clearly marked signs prohibiting cellular use.

However, there is a way to safely eliminate this problem immediately, by using a cell phone GSM jammer. Learning how jammers work on wireless devices will make it possible to clearly understand and appreciate their overall value.

The Basics Of The Blocker

Being able to successfully disrupt a cell phone is basically the same as being able to jam any other type of mobile radio communication with a standard blocker. Keep in mind that a wireless device is able to function by communicating directly with its designated service network through a base station or tower. These towers divide cities into cells or smaller areas.

As a mobile cellphone user drives down the street, the signal is passed like a football between towers along the way. A cell phone disruptor is able to successfully transmit through the same exact radio frequencies that are being used as these wireless devices.

This 'white noise' effectively disrupts the communication that is flowing between the base station that is located within the tower and the handset. This is what is referred to technically by the term “denial-of-service”. The cell phone jammer kit is specifically designed to cancel out (deny) a signal within the radio spectrum to the handsets that exist within the range of the jamming device.

How They Get the Job Done

Cell phone blockers have been designed to completely overpower the mobile device by transmitting a standard signal through the same exact frequency, as mentioned earlier. However, the key is to make sure that it achieves this with a considerable amount of power where the two signals successfully collide and even cancel one another out completely causing a disruption of services.

In basic layman terms, the cell phone is actually tricked into believing that there is not a service available in the area. Therefore, when people try to use their phones within an area that has been jammed, it will appear as if they are simply in a “dead zone” without service.

How Can This Blockage Be Accomplished?

Although different cellular systems process a wide range of different signals, all networks use basic radio signals in a way where they can easily become interrupted. GSM2, the system that is used within digital cellular as well as systems that are based on a foundation of PCS, operate within the 900-MHz as well as 1800 MHz bands located either in Asia or Europe as well as the 1900 MHz band in North America.

The scrambler devices are able to successfully broadcast any type of frequency that is effective against CDMA, AMPS, GSM, TDMA, DCS, PCS, Nextel and even iDEN systems. 'Old-fashioned' analog mobiles, as well as today’s digital devices are susceptible to jamming.

What is the Average Effective Range?

That specifically depends on the unit power and local environment and signal strength. To a small degree, this can also include such things as walls within a building that are able to slightly diminish the signal that is being transmitted by the blocker.

Low-powered blockers are able to stop all calls within a range of about 60 feet, and higher powered models can create a “dead zone” the size of a football field.

The Most Powerful Devices on the Market

However, keep in mind that such powerful units are used by law enforcement officials, and agencies, with units capable of a much larger dead zone. Some government models are capable of creating dead zones that extend for farther than a one Km radius from the device.

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